Stopcock rotor



Dec. 9, 1952 E. J. MANSFIIELD STOPCOCK ROTOR Filed Dec. 4, 1950'Inventor M w w Patented Dec. 9, 1952 STOPCOCK ROTOR Ernest JohnMansfield, London, England, assignor to W. Edwards & Co. (London)Limited, London, England Application December 4, 1950, Serial No.198,931 In Great Britain December 31, 1949 d Claims.

This invention concerns glassware stop-cocks.

In the usual form of stop-cock the rotor comprises a conical body and atransverse handle fused to the larger end of thebody.

A disadvantage with this known form of rotor is that there isconsiderable risk of fracture of the neck between the handle and thebody when excessive rotary force is applied and furthermore it ismostdifficult to examine the bore in the rotor when the stop-cock isassembled.

An object of the present invention is to provide an improved form ofrotor which avoids one or both of the above disadvantages.

According to one feature of the present invention the handle is in theform of a flange of circular or polygonal outline which may extendaround the periphery of the larger diameter end of the body. In use,therefore, one grips a surface of more or less circular outline ratherthan the usual narrow handle which is held between the finger and thumb.

According to a further feature of the invention the body and handle ofthe rotor are hollow and may be formed from tubular stock. A bore insuch rotor then may take the form of a diametrically extending tubesealed at its opposite ends into the wall surface of the hollow :body.Thus the bore can readily be viewed when the stop-cock is assembled andits contents may be inspected from either open end without having tolook through a substantial thickness of glass and/or through a film ofgrease (usually two thicknesses of glass and the grease film).

The invention will be described further with reference to theaccompanying drawings, which show a preferred embodiment of theinvention, and in which:

Fig. 1 is a perspective view of a rotor constructed in accordance withthe invention,

Fig. 2 is a plan View of a rotor corresponding to Fig. 1 and seen fromabove,

Fig. 3 is a plan view of a rotor seen from below,

Fig. 4 is a side elevation thereof, in section on the line AA of Fig. 3,

Fig. 5 shows a rotor having a handle of polygonal shape,

Fig. 6 shows a rotor in which the handle is knurled, and

Fig. 7 shows a rotor in which the flange has been deformed to producetwo web-shaped proin an outward curve extending rathermore-than Theouter surface of this flange (Fig. 6) may be knurled to facilitategripping. Two diametrically opposite pips 3 are fused on to the surfaceof the flange 2 to assist in the turning action applied to the rotorbody I oralternatively the flange may, as shown in Fig. 7, be deformedat diametrically opposite points to form two webshaped protuberances 3|which serve thesame purpose as the pips 3. The flange may furthermore beformed by attaching to the rotor body a separate ring or disc of glass,metal or other material.

A bore 4 is comprised by a diametrically extending tube sealed at itsopposite ends into the wall surface of the hollow body I. Above andbelow the bore, cannelures 5 shaped as grooves of radiused section andeach having a width commensurate with the diameter of said bore, areprovided for retaining supplies of grease for sealing. Such grease sealspermit of a shorter and more compact stop cock construction.

Although in the embodiment of the invention as described above theflange 2 has been defined as having circular shape, other shapes mayprove equally advantageous. As an example, in Fig. 5, a flange 2! havinga polygonal outline is illustrated.

These forms of stop-cock rotor are readily adaptable to the provision ofan eifective metal retaining clip for preventing separation of thecomponents of the cock. They are more readily produced than rotors ofthe conventional type and may be made without employment of skilledglass blowing methods.

I claim:

1. A stop-cock rotor including a tapering body portion, a handledisposed at the larger diameter end thereof, both said body portion andsaid handle being hollow and being formed from tubular stock, and adiametrically extending tube sealed at its opposite ends into the bodyportion to form a bore therethrough, said handle comprising an outwardlyturned over flange extending around the periphery and forming acontinuation of said larger diameter end, whereby the resultant openconstruction of said handle enables inspection of said bore to beeffected.

2. A stop-cock rotor including a tapering body portion, a handledisposed at the larger diameter end thereof, both said body portion andsaid handle being hollow and being formed from tubular stock, and adiametrically extending tube tion to form a bore therethrough, saidhandle comprising an outwardly turned over and fluted flange extendingaround the periphery and forming a continuation of said larger diameterend, and two diametrically opposed pips fused on to said flange, wherebythe resultant open construction of said handle enables inspection ofsaid bore to be effected, and said pips in cooperation with said flutingprovide for a positive grip of said handle.

3. A stop-cock rotor including a tapering body portion, a handledisposed at the larger diameter end thereof, both said body portion andsaid handle being hollow and being formed from tubular stock, and adiametrically extending tube sealed at its opposite ends into the bodyportion to form a bore therethrough, said handle comprising an outwardlyturned over and fluted flange extending around the periphery and forminga continuation of said larger diameter end, and two web-shapedprotuberances formed by deformation of said flange at diametricallyopposite points thereof, whereby the resultant open construction of saidhandle enables inspection of said bore to be effected, and saidprotuberances in cooperation with said fiuting provide for a positivegrip of said handle.

4. A stop-cock rotor including a tapering body portion, a handledisposed at the larger diameter end thereof, both said body portion andsaid handle being hollow and being formed from tubular stock, and adiametrically extending tube sealed at its opposite ends into the bodyportion to form a bore therethrough, said body portion being formed withcannelures above and below the bore to retain supplies of grease forsealing, said handle comprising an outwardly turned over flangeextending around the periphery and forming a continuation of said largerdiameter end, whereby the resultant open construction of said handleenables inspection of said bore to be effected, and said grease sealingmakes possible a short and compact construction of said rotor.

ERNEST JOHN MANSFIELD.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,349,823 Eimer et al Aug. 17,1920 1,533,793 Failla Apr. 14, 1925 1,714,606 Lotz May 28, 19292,273,205 Kemmer et a1 Feb. 17, 1942 FOREIGN PATENTS Number Country Date329,029 Great Britain of 1930

